Fixed compilation for windows

.gitignore

@@ -15,3 +15,4 @@ rtlgenrandom*
 steamclient.exp
 steamclient.lib
 out/*
+glew

dll/dll.cpp

@@ -204,7 +204,9 @@ S_API bool S_CALLTYPE SteamAPI_Init()
 
     Steam_Client* client = get_steam_client();
     client->userLogIn();
+#ifndef NO_OVERLAY
     client->steam_overlay->SetupOverlay();
+#endif
 
     return true;
 }

download_glew.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+rm -rf glew*
+
+URL="https://downloads.sourceforge.net/project/glew/glew/2.1.0/glew-2.1.0-win32.zip?r=https%3A%2F%2Fsourceforge.net%2Fprojects%2Fglew%2Ffiles%2Fglew%2F2.1.0%2Fglew-2.1.0-win32.zip%2Fdownload&ts=1565791827"
+
+wget "$URL" -O glew.zip
+unzip glew.zip
+rm glew.zip
+mv glew-* glew
+# Fix libraries name
+sed -i "s/LIBCMT/libcmt/;s/OLDNAMES/oldnames/" glew/lib/Release/*/glew32s.lib

overlay_experimental/steam_overlay.h

@@ -124,10 +124,10 @@ public:
 class Steam_Overlay
 {
 public:
-    Steam_Overlay(Settings* settings, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Networking *network);
-    ~Steam_Overlay();
+    Steam_Overlay(Settings* settings, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Networking *network) {}
+    ~Steam_Overlay() {}
 
-    bool Ready() const { return false: }
+    bool Ready() const { return false; }
 
     bool NeedPresent() const { return false; }